#include <iostream>
using namespace std;
int main()
{
	int year;
	cout<<"Please enter year:"<<'\n';
	cin>>year;
	if ((year%4 == 0 && year%100 == 0) || (year%4 == 0 && year%400 == 0))
	{
		cout<<year<<" is.";
	}
	else
	{
		cout<<year<<" is not.";
	}
	return 0;
}
